| 摘要 |
PURPOSE: To desirably heat foods or the like by forming a gray body layer having an absorption rate of a specified value or more and penetrating a microwave on the surface. CONSTITUTION: A gray body layer 40 is a polycarbonate having a black coloring matter and the specified particle diameter, has an absorbing rate of about 0.50 or more, and is formed on the lower side of a flat body 20. Parallel folded surfaces 12, 14 are formed at facing ends of the flat body 20, and legs 22, 24, 26, 32, 34, 36 are projected. A sliced bread of a pizza is placed on the flat body 20, and put in a household microwave oven. Microwave energy MW passes through the lower part of the food on the flat body 20, heat energy is absorbed in the layer 40, and the lower surface of the food is quickly heated. The surface of the bread is sufficiently made brown and the bread is made crisp without applying high surface temperature to the bread.
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